Power-law energy spectrum and orbital stochasticity

1991 ◽  
Author(s):  
K. Mima ◽  
W. Horton ◽  
T. Tajima ◽  
A. Hasegawa
Keyword(s):  
Energy Spectrum ◽  
Power Law

scholarly journals Synchrotron Emission from Particles Having A Truncated Power-law Energy Spectrum

1974 ◽  
Vol 168 (2) ◽  
pp. 379-397 ◽  
Author(s):  
L. J. Gleeson ◽  
M. P. C. Legg ◽  
K. C. Westfold
Keyword(s):  
Energy Spectrum ◽  
Power Law ◽  
Synchrotron Emission

scholarly journals Ultraintense Laser-Driven Nonthermal Acceleration of Charged Particles in the Near-QED Regime

2021 ◽  
Author(s):  
Yulong Hu ◽  
Baifei Shen ◽  
Jiancai Xu ◽  
Yasuhiro Kuramitsu ◽  
Hideaki Takabe ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Power Law ◽  
Laser Intensity ◽  
Critical Role ◽  
Charged Particles ◽  
Radiation Reaction ◽  
Intense Laser ◽  
Acceleration Process ◽  
Qed Regime ◽  
Power Law Index

Abstract Here, we have studied the nonthermal acceleration of energetic electrons/protons under the near-QED regime by extending the laser intensity beyond 1023 W/cm2 based on a two-dimensional particle-in-cell simulation. The radiation-reaction (RR) effect plays a critical role and brings a quantum stochastic effect to the charged-particle acceleration process. Background electrons in plasma are accelerated in an intense laser field to several GeVs with strong oscillations and thus radiate γ-ray photons. The emitting γ-photons have a broad energy spectrum with maximal energy up to 3 GeV and result in radiation-reaction trapping of the electrons, forming a relativistic plasma bunch in the plasma channel. The accumulation of electrons and protons produces a charge-separation field for the acceleration/deceleration of charged particles. The accelerated electrons have a nonthermal spectrum with a power-law index of 1.5 with a laser intensity 1023 W/cm2 lower than that in the non-QED regime. As the laser intensity further increases over 1024 W/cm2, the power-law index further drops to 1.2. Moreover, the energy spectrum of accelerated protons has a nonthermal distribution with a power-law index of 0.7, which is much lower than that of electrons in the near-QED regime.

A FRACTAL-DISCRETE SCHEME FOR COSMIC PARTICLE ACCELERATION

2007 ◽  
Vol 16 (02n03) ◽  
pp. 521-526
Author(s):  
A. L. DOS SANTOS ◽  
L. P. L. DE OLIVEIRA ◽  
B. E. J. BODMANN ◽  
M. T. VILHENA
Keyword(s):  
Particle Acceleration ◽  
Energy Spectrum ◽  
Energy Range ◽  
Power Law ◽  
Cosmic Ray ◽  
High Energy ◽  
Cosmic Particle ◽  
Observational Fact ◽  
Very High Energy ◽  
Very High

The present article is an attempt to provide a parametrization for particle acceleration probabilities in the very high energy range combining a discrete fractal scheme for interaction probabilities and the observational fact of a power law energy spectrum for cosmic ray particles.

scholarly journals Universal power law for the energy spectrum of breaking Riemann waves

JETP Letters ◽  
2013 ◽  
Vol 98 (4) ◽  
pp. 237-241 ◽  
Author(s):  
D. Pelinovsky ◽  
E. Pelinovsky ◽  
E. Kartashova ◽  
T. Talipova ◽  
A. Giniyatullin
Keyword(s):  
Energy Spectrum ◽  
Power Law ◽  
Universal Power Law ◽  
Riemann Waves

Energy spectrum of diffuse primary X rays up to 180 keV

1968 ◽  
Vol 46 (10) ◽  
pp. S461-S465 ◽  
Author(s):  
J. A. M. Bleeker ◽  
J. J. Burger ◽  
A. J. M. Deerenberg ◽  
A. Scheepmaker ◽  
B. N. Swanenburg ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Power Law ◽  
Plastic Scintillator ◽  
Geomagnetic Latitude ◽  
Cosmic Ray ◽  
Rotating Disk ◽  
The Other ◽  
X Rays ◽  
X Ray ◽  
Good Agreement

Two balloon flights with identical X-ray detectors were carried out in the summer of 1966, one from De Bilt, the Netherlands (geomagnetic latitude 53 °N), and the other from Taiyomura, Japan (geomagnetic latitude 25 °N). The detector consists of a NaI(Tl) crystal, 12.5 mm thick and 50 mm in diameter, surrounded by an effective collimator-shield and a plastic scintillator guard counter. The rotating disk incorporated enables the separation of "forward" X rays from the cosmic-ray-induced background. The results of the flights are in very good agreement with each other. In view of the rather large difference in geomagnetic latitude in these two flights, this agreement supports the celestial origin of the primary X rays observed. The energy spectrum between 20 and 180 keV can be expressed by a power law:[Formula: see text]

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